Answer:
When the electrical current passes through the conductors, the polarity is changed, and the diaphragm interacts with the permanent magnets, vibrating and creating sound.
Explanation:
It will depend on the frictional force involved in the two. I think it will take more force in sled.
Answer:
Explanation:
Given
Mass of mother 
Mother is released with a speed of 
Assuming we need to find elastic Potential energy stored in Trampoline
Kinetic energy acquired by Mother comes from Elastic Potential Energy stored in the spring
I.e. Elastic Potential Energy=Kinetic Energy of mother
So 246.875 J of Energy is stored in the trampoline as he pull the ring
Answer:
The coconut hit the ground after 1.28 s
Explanation:
Velocity: This can be defined as the rate of change of displacement. Or it is defined as speed in a specified direction. Velocity is a vector quantity. The S.I unit of velocity is m/s.
Using the equation of motion,
S = ut + 1/2gt²....................................... Equation 1
Where S = distance, u = initial velocity, t = time, g = acceleration due to gravity
<em>Given: s= 8 m, u = 0 m/s ( because it was drop from a height), </em>
<em>Constant : g = +9.8 m/s²</em>
<em>Substituting these values into equation 1,</em>
<em>8 = 0×t + 1/2(9.8×t²)</em>
<em>8 = 4.9t²</em>
<em>t² = 8/4.9</em>
<em>t = √1.63</em>
<em>t = 1.276 s</em>
t = 1.28 s
Therefore the coconut hit the ground after 1.28 s
